package com.meirimoney.utilities;

import java.security.MessageDigest;

public class Utility
{

	/***
	 * Md5加密方法
	 * 
	 * @param source
	 * @return
	 */
	public static String calculateMd5(String source)
	{
		MessageDigest md5 = null;
		try
		{
			md5 = MessageDigest.getInstance("MD5");
		} catch (Exception e)
		{
			e.printStackTrace();
			return "";
		}
		char[] charArray = source.toCharArray();
		byte[] byteArray = new byte[charArray.length];
		for (int i = 0; i < charArray.length; i++)
		{
			byteArray[i] = (byte) charArray[i];
		}
		byte[] md5Bytes = md5.digest(byteArray);
		StringBuffer hexValue = new StringBuffer();
		for (int i = 0; i < md5Bytes.length; i++)
		{
			int val = ((int) md5Bytes[i]) & 0xff;
			if (val < 16)
			{
				hexValue.append("0");
			}
			hexValue.append(Integer.toHexString(val));
		}
		return hexValue.toString();
	}
}
